Date: Tue, 13 Aug 2013 15:54:56 -0400 From: Glen Barber <gjb@FreeBSD.org> To: Hiroki Sato <hrs@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, ian@FreeBSD.org Subject: Re: svn commit: r254217 - head/sys/conf Message-ID: <20130813195456.GB2241@glenbarber.us> In-Reply-To: <20130814.043625.854344935412527199.hrs@allbsd.org> References: <20130813171302.GQ2432@glenbarber.us> <1376415112.3320.229.camel@revolution.hippie.lan> <20130813175335.GR2432@glenbarber.us> <20130814.043625.854344935412527199.hrs@allbsd.org>
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On Wed, Aug 14, 2013 at 04:36:25AM +0900, Hiroki Sato wrote:
> Glen Barber <gjb@FreeBSD.org> wrote
> in <20130813175335.GR2432@glenbarber.us>:
>
> gj> On Tue, Aug 13, 2013 at 11:31:52AM -0600, Ian Lepore wrote:
> gj> > I'm not even sure what $0 *should* expand to in a script that was
> gj> > sourced in. The manpage doesn't say anything meaningful to me about it.
> gj> > Maybe it's a kind of "indeterminate results" thing which is pretty much
> gj> > what we're seeing.
> gj> >
> gj>
> gj> When the file is sourced, it should expand to the name of the file
> gj> sourcing the file.
>
> It is sourced in the osreldate.h target in Makefile, so $0 will be
> /bin/sh. Why $0 is used here in the first place? The previous
> version used $SYSDIR and it looks more reasonable to me.
>
$0 is used to speed up execution of svnversion when evaluating if the
${svnversion} is compatible with the tree. Rather than running on the
entire tree, $0 should only be run on a single file.
But, I am at the point now of being ready to revert all these changes
back to the original newvers.sh before I added svnliteversion...
Glen
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